[XSL-LIST Mailing List Archive Home]
[By Thread]
[By Date]
Re: [xsl] What is the "closure" of a function?
Subject: Re: [xsl] What is the "closure" of a function? From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Fri, 6 Jun 2014 14:03:35 -0000 |
Thank you Abel, I hope this could be fixed in the 3.1 documents. On Fri, Jun 6, 2014 at 4:39 AM, Abel Braaksma (Exselt) abel@xxxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > > On 23-5-2014 22:28, Dimitre Novatchev dnovatchev@xxxxxxxxx wrote: >> The Functions and Operators 3.0 recommendation >> (http://www.w3.org/TR/xpath-functions-30/) uses the term "closure" of >> a function: >> >> "In effect, the static and dynamic part of the context thus act as >> part of the closure of the function item." >> >> However, there is no formal definition of "closure". >> >> A search for "closure " in the Data-Model 3.0" Recommendation yields 0 results. > > It appears to me that at some point the term "closure" was dropped. In > the public 06/2011 version of the XDM, a definition existed: > > "[Definition: The combination of the variable values needed to execute a > function and the function implementation are called a closure.]" (see > http://www.w3.org/TR/2011/WD-xpath-datamodel-30-20110614/#function-items) > > But in the following draft, 12/2011, this was dropped/revised. > > It looks like the term closure was not fully removed in related documents. > >> However, the XDM defines the so called "nonlocal variable bindings": >> >> "nonlocal variable bindings (a mapping from xs:QName to item()*): This >> provides a value for each of the function's free variables (i.e., >> variables referenced by the function's implementation, other than >> locals and parameters)." >> >> My question is: >> >> Is it safe to assume that what is referred to as the "closure" >> property of functions in the F & O document is the same as the >> "nonlocal variable bindings" property of functions, defined in the >> XDM? > > Yes, I think that is a safe assumption. > > Cheers, > > Abel Braaksma > Exselt XSLT 3.0 streaming processor > http://exselt.net > -- Cheers, Dimitre Novatchev --------------------------------------- Truly great madness cannot be achieved without significant intelligence. --------------------------------------- To invent, you need a good imagination and a pile of junk ------------------------------------- Never fight an inanimate object ------------------------------------- To avoid situations in which you might make mistakes may be the biggest mistake of all ------------------------------------ Quality means doing it right when no one is looking. ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play ------------------------------------- To achieve the impossible dream, try going to sleep. ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :) ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Re: [xsl] What is the "closure" of , Abel Braaksma (Exsel | Thread | [xsl] Why does my streaming program, Costello, Roger L. c |
Re: [xsl] What is the "closure" of , Abel Braaksma (Exsel | Date | [xsl] Why does my streaming program, Costello, Roger L. c |
Month |
Keywords